MAX8678EVKIT+ Maxim Integrated Products, MAX8678EVKIT+ Datasheet

MAX8678EVKIT+

Manufacturer Part Number

MAX8678EVKIT+

Description

KIT EVAL FOR MAX8678

Manufacturer

Maxim Integrated Products

Datasheets

1.MAX8678ETE.pdf (13 pages)

2.MAX8678EVKIT.pdf (8 pages)

Specifications of MAX8678EVKIT+

Current - Output / Channel

24mA

Outputs And Type

4, Non-Isolated

Features

Dimmable, with Mono 1.1W Class AB Audio Amplifier

Voltage - Input

2.7 ~ 5.5V

Utilized Ic / Part

MAX8678

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Voltage - Output

Lead Free Status / Rohs Status

Lead free / RoHS Compliant

Current page: 1 of 8
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The MAX8678 evaluation kit (EV kit) is a fully assembled

and tested printed-circuit board (PCB) for evaluating

the MAX8678 white LED charge pump with mono class

AB audio amplifier. The MAX8678 EV kit drives up to

four LEDs for backlighting. In addition, the EV kit is able

to drive a combined loudspeaker/earpiece speaker for

the mono audio amplifier. An on-board pulse generator

provides an easy way to evaluate the MAX8678’s ampli-

fier gain adjustment and LED dimming.

19-4084; Rev 0; 3/08

For pricing, delivery, and ordering information, please contact Maxim Direct 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

DESIGNATION QTY

C1, C2, C4, C5,

C3, C7, C8

C12, C13

JU1, JU7

JU2–JU5

C9, C11

D1–D4

D5, D6

JU6

________________________________________________________________ Maxim Integrated Products

1µF ±10%, 6.3V X5R ceramic

capacitors (0402)

Murata GRM155R60J105K

TDK C1005X5R0J105K

0.1µF ±10%, 10V X5R ceramic

capacitors (0402)

TDK C1005X5R1A104K

4.7µF ±10%, 6.3V X5R ceramic

capacitor (0603)

Murata GRM188R60J475K

TDK C1608X5R0J475K

10pF ±5%, 50V C0G ceramic

capacitors (0402)

TDK C1005C0G1H100D

White LEDs

Nichia NSCW215T

Green LEDs (0603)

Panasonic LNJ308G8TRA

Not installed, 10-pin (2 x 5) header,

0.1in spacing

3-pin headers

2-pin headers

Not installed, PCB short

General Description

DESCRIPTION

MAX8678 Evaluation Kit

♦ High-Efficiency White LED Charge Pump

♦ Mono Class AB Loudspeaker Amplifier

♦ 2.7V to 5.5V Supply Voltage Range

♦ Thermal Shutdown, Open- and Short-Circuit

♦ Fully Assembled and Tested

♦ 16-Pin, 3mm x 3mm Thin QFN IC Package

+ Denotes lead-free and RoHS-compliant.

DESIGNATION QTY

Protections

R1, R2

R3, R4

Individual Adaptive Supply for Each LED

24mA to 0.1mA Dimming Range

Low 50µA (typ) Quiescent Current

1.1W RMS Mono Output (8Ω, V

Low 0.004% THD+N at 1kHz

High 90dB PSRR at 1kHz

Fully Differential Inputs

-9dB to +18dB Gain Settings in 3dB Steps

Low Quiescent Current

S1–S5

—

MAX8678EVKIT+

PART

470k Ω ±5% resistors (0402)

220 Ω ±5% resistors (0402)

10k Ω ±5% resistor (0402)

Momentary pushbutton switches

Panasonic EVQ-PHP03T

White LED charge pump with mono

C l ass AB aud i o am p l i fi er ( 16 thi n QFN )

Maxim MAX8678ETE+

(Top Mark: AFF)

M axi m l ow - p ow er LC D m i cr ocontr ol l er

(68 QFN)

MAXQ2000-RAX+

Maxim ultra-low-noise LDO linear

regulator (5 SC70)

MAX8511EXK25+

(Top Mark: ADV)

16MHz crystal

Citizen HC49US16.000MABJ-U

ECS ECS-160-20-4X

Vishay XT9S20ANA16M

N ot i nstal l ed , 32.768kH z cr ystal ( 1206)

Shunts, 2 position

PCB: MAX8678 Evaluation Kit+

Ordering Information

Component List

DESCRIPTION

= 5V)

TYPE

EV Kit

Features

Related parts for MAX8678EVKIT+

MAX8678EVKIT+ Summary of contents

Page 1

... Supply Voltage Range ♦ Thermal Shutdown, Open- and Short-Circuit Protections ♦ Fully Assembled and Tested ♦ 16-Pin, 3mm x 3mm Thin QFN IC Package Ordering Information PART MAX8678EVKIT+ + Denotes lead-free and RoHS-compliant. Component List DESIGNATION QTY 470k Ω ±5% resistors (0402) R1 220 Ω ...

Page 2

MAX8678 Evaluation Kit Component Suppliers SUPPLIER Kamaya, Inc. 260- 489- 1533 www.kamaya.com M ur ata E l ectr oni cs 814- 237- 1431 www.murata-northamer ica.com ca, Inc. Nichia Corp. 248- ...

Page 3

Detailed Description On-Board Pulse Generator The on-board pulse generator provides an easy way to evaluate the LED dimming and amplifier gain adjust- ment. The pulse generator outputs the serial-pulse sig- nals for ENLED and ENAMP. LED D6 indicates when the ...

Page 4

MAX8678 Evaluation Kit IN1 ENLED GND1 JU4 ENLED R1 470kΩ ENAMP JU5 ENAMP R2 470kΩ C2 JU3 1μF IN+ C1 JU2 1μF IN JU1 Figure 1. MAX8678 EV Kit Schematic (MAX8678) 4 _______________________________________________________________________________________ JU6 ...

Page 5

S1 DEMO S2 LED UP S3 DOWN GAIN DOWN GAIN VIO_2V5 LED C11 10pF J1 JTAG C9 J1-2 10pF J1-10 J1-8 J1-4 VIO_2V5 J1-7 TCK J1-1 TDI J1-9 TMS J1-5 TDO J1-3 RESET J1-6 IN2 IN2 3 ...

Page 6

MAX8678 Evaluation Kit Figure 3. MAX8678 EV Kit Component Placement Guide—Component Side 6 _______________________________________________________________________________________ ...

Page 7

Figure 4. MAX8678 EV Kit PCB Layout—Component Side _______________________________________________________________________________________ MAX8678 Evaluation Kit 7 ...

Page 8

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 8 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2008 Maxim Integrated Products ...

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